Rotating Lens Laser Scanner for Compact LiDAR Design
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Solution Overview
Problem
Existing laser radars require a large space due to the need for a rotatable reflector to achieve complete scanning of a surface, resulting in a bulky size and increased dimensions.
Innovation Solution
A compact laser scanning device with a lens fixture and light path regulation mechanism, including a distance regulation component and a rotation driving component, which allows the lens to rotate around a set axis parallel to the optical axis, enabling deflection of the laser beam through different refraction angles without the need for extensive movement, thus reducing the device's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rotatable reflector is used to achieve complete scanning of a surface, then the scanning coverage is improved, but the device size and space requirements increase
Solution Approach 1:
The patent replaces the traditional mechanical reflector rotation system with an optical system comprising a fixed reflector and a rotatable lens. The lens rotation changes the refraction angle of the laser beam, achieving light path deflection without mechanical reflector movement. This substitution eliminates the need for large-space mechanical rotation mechanisms while maintaining complete surface scanning capability.
Solution Approach 2:
The patent changes the optical parameter (refraction angle) by rotating the lens around its optical axis. By adjusting the lens rotation angle, the refraction angle of the laser beam passing through the lens changes, thereby deflecting the light path to different directions. This parameter-based control achieves scanning functionality without requiring mechanical reflector rotation, reducing device size.
2Ease of operation
If a two-dimensional vibration mirror is used to change light path direction, then the scanning function is achieved, but the device complexity and space requirements increase
Solution Approach 1:
The patent replaces the complex two-dimensional vibration mirror mechanism with a simpler optical system using a fixed reflector and a rotatable lens. The lens rotation around its optical axis changes the refraction angle, achieving light path deflection in multiple directions without requiring complex vibration mirror mechanisms.
Solution Approach 2:
The rotatable lens serves multiple functions: it focuses the laser beam, deflects the light path through refraction, and enables scanning in multiple directions through rotation. This single component performs what would traditionally require multiple components (vibration mirror, reflector, positioning mechanisms), thereby reducing overall device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables compact and efficient scanning of a two-dimensional plane with a single rotational movement of the lens, reducing the overall size of the laser scanning device while maintaining effective data acquisition for three-dimensional modeling.
Implementation Method 1
the lens is arranged on the lens fixture, and one side of the lens faces incident light... regulate an eccentric distance of the lens relative to the incident light
Data Source
AI summary
An embodiment provides a laser scanning device, which includes a lens fixture, a lens and a light path regulation mechanism. The lens is arranged on the lens fixture, and one side of the lens faces incident light. The light path regulation mechanism is connected with the lens fixture and includes a distance regulation component and a rotation driving component, the distance regulation component is configured to regulate a position of the lens fixture, the distance regulation component regulates the position of the lens fixture to correspondingly regulate an eccentric distance of the lens relative to the incident light, the rotation driving component is configured to drive the lens to rotate around a set rotation axis that is parallel to an optical axis of the lens. Another embodiment discloses a laser radar.